There are a lot of video games out there and a lot of ways to buy them. But you don't have bottomless pockets of money and you might be unsure about which games to get, whether you really should download them or go to a store and... is it really necessary to pre-order? And don't these games ever go on sale?
Video games are the violins of popular entertainment. To play them requires knowledge and skill. To play them well requires practice and maybe a bit of advice.